Patent US3823924A successfully refreshed from Google Patents.
US3823924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter device
Assignee: Envirotech Corp
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Filing: 1972-06-21
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Granted: 1974-07-16
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Expires: 1992-06-21
Abstract
Abstract A filter unit for use in an apparatus for intercontacting fluid streams and comprising a hollow perforated spherical member of polymeric plastic material having a solid spherical member disposed therein and freely movable with respect thereto. As applied to a separator in a dust collecting system the units are disposed within a bed of water flowing downwardly in the separator and are also subjected to a current of dust laden air moving upwardly through the bed and contacting the units. In such environment the units move upwardly through the bed of water under the action of the current of air until they reach the surface, where they become filled with water and then drop to the bottom of the bed of water where the water flows out and the cycle is repeated. Such movement of the units aids in the removal of material from the dust laden air.
Inventors
- 👤 H Hoon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:33
CPC Classifications
B; B01; B01D; B01D47/00; B01J; B01J19/00; B01J19/30; B01J2219/00; B01J2219/30; B01J2219/302; B01J2219/30207; B01J2219/304; B01J2219/30466; Y; Y10; Y10S; Y10S261/00; Y10S261/72
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
192 words
In an apparatus for cleaning a contaminated gaseous stream by counter-currently contacting the gaseous stream with a liquid stream through a loosely confined bed of generally spherical contact articles, said articles each comprising: a. a pair of similarly sized hollow hemispheres made of perforated polymeric material; b. each of said hemispheres including spaced-apart tab portions which extend inwardly from the equatorial edge of the hemisphere substantially coplanar with that equatorial edge, said tab portions being arranged on one of said hemispheres of said pair in a pattern which is symmetric with the arrangement of tabs on the other said hemisphere; c. said pairs of said hemispheres being joined to form a sphere with associated pairs of said tabs juxtaposed within the general peripheral confines of the article; d. each of said hemispheres further including recesses which are formed into the walls thereof and which are associated with each of said tabs, said recesses extending generally perpendicular to the plane of the tabs; and e. a solid spherical member disposed to move freely within the sphere formed from said perforated hemispheres, said solid sphere having a density greater than the density of water.
Claim 2
Dependent Claim
192 words
In an apparatus for cleaning a contaminated gaseous stream by counter-currently contacting the gaseous stream with a liquid stream through a loosely confined bed of generally spherical contact articles, said articles each comprising: a. a pair of similarly sized hollow hemispheres made of perforated polymeric material; b. each of said hemispheres including spaced-apart tab portions which extend inwardly from the equatorial edge of the hemisphere substantially coplanar with that equatorial edge, said tab portions being arranged on one of said hemispheres of said pair in a pattern which is symmetric with the arrangement of tabs on the other said hemisphere; c. said pairs of said hemispheres being joined to form a sphere with associated pairs of said tabs juxtaposed within the general peripheral confines of the article; d. each of said hemispheres further including recesses which are formed into the walls thereof and which are associated with each of said tabs, said recesses extending generally perpendicular to the plane of the tabs; and e. a solid spherical member disposed to move freely within the sphere formed from said perforated hemispheres, said solid sphere having a density greater than the density of water.
Claim 3
Dependent Claim
24 words
An apparatus according to claim 1 wherein the diameters of said solid spherical members are less than the radiuses of the outer spherical members.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |